Sewing-machine.



P. HLEB.

SEWING MACHINE.

MPL10/umu FILED ocnzx www am. 14, 1915.

' rain riErE.

PETER HLEB, ory ELIZABETH, NEW JERSEY. AssIGNoR To THE 'SINGER MANUFAC-TUBING COMPANY, A CORPORATION-OF NEWJJERSEY.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Sept. 14,1915.

Application filed October 21, 1,914. Serial No. 8674.704.

To alla/imm it may conce/1% 4 Be it known that l, Pi-:Tiii: HLEB, acitizen of the United States, residing at Elizabeth', in the county ofUnion and State of New Jersey,l have invented certain new and usefulImproven'ients in Sewing-lilachnes, of which the followingfis aspecification, reference being had therein tothe accompanying drawings.

This invention relates more particularly to an improvement in operatingmeans for -stitcliforining mechanism involving a rotary shaft carryingoneof the stitcli-forming i elements `and performing lateral joggingmovements in its coperation with a reciprocating needle; and it has forits object the provision of a construction in which efficient andsubstantial driving means may be em which shall be nnaiiected'hy said'ployed jogging movements.

Inth'e preferred form of the improvement the loop-taker shaft is formedin separate sections arranged end--to-end, one of the sections licingn'iountled for movement upon a fixed axis and having the actuating meansvconnectcC thereto, while the other section carrying` he loop-taker isjournaled at one end in a bearing liloclchavingi a fulcruin vwhose'axis`is disposed transverse to and is directed -intermediate the adjacentends'of said sections which are'connected together for rotation` inunison by a universal coupling, means being applied to the loop-takercarrying section whereby it performs jogging movements in conjunctionwith its turning movements, as described more fully inztlie pendingapplication of Albert F. Fi-

field, Serial No. 828,663, filed April 1, 19.14.`

and permits the accurate formation of the intern'ieshing gears so as toinsure against excessive noise and undue wear at the high speeds vatwhich this class of machines is designed'to be driven `iii theproduction of groups of overseain sti'trhcs for attaching buttons togarments and for other purposes.y

In .the accompanying drawings, Figure l is a side elevation, partly insection, and Fig. 2 a bottom plan, vi'cw of a sewing machineI embodyingthe present improvement. Figs. 3, 4. and o are perspective viewsrepresenting 'transversely slotted collars applied to the adjacentendsof the loop-taker shaftsections and an intermediate'block in theform of a disk or washer having transverse tongues upon its oppositefaces. Pig. 6, is'a perspective view of the sliding forwardshaft-bearing. l `ig. 7 is an elevation of the pivoted bearing block forthe loop-taker sha ftesection and the hanger upon which thel same isfulcrumed, and Fig. 8 is a perspective view of said hearing block.

The inachineframe is formed with the usual bed-plate 1 and overhangingbracketarm 2 in which latter is journaled the main or dri ving shaft 3carrying the fast and loose belt-pulleys l and .Connected with themain-shaft by usual or suitable means is the reciprocating needle-bar (lcarrying the 'eyepointed needle 7v cooperating with the looper 8 in theproduction ofsingle-chain overseam stitches, as illustrated herein.

The looper-shaft is disposed beneath the bed-plate and is formed in twosections 9 and 10 arranged end-to-end, the latter having fixed upon itsforward extremity the louper 8. These shaft-sections have secured upontheir adjacent ends by means of setscrews 11 the collars 12 and 13provided upon thei adjacent faces with the diametrical grooves or slots14. rl`he collars 12 and 13 have interposed between them the circularblock or washer 15 formed upon its opposite faces with the diametricaltongues or ribs 1-(3 and 17 arranged crosswise of each other andentering the grooves l of the blocks 12 and '13, respectively. 15 thusaffords-a universal coupling element between the transversely slottedadjacent ends ot' the shaft-sections, or collars 12 and 125 thereon,which-latter permit the movenient of the secondary loopcr-carrying sec-The block 'tion 10 out of alinement with the primary section 9 withoutdisturbing their operative relation, the lateral inclination of thesection .10 being permitted by the -free working of the coupling block15 disposed in the plane of such inclination within its respective slot14, While the other tongue of the coupling block serves in conjunctionthere- @Witli to prevent its lateral displacement rela tively totheshaft, as will betwreadily under stood. It is of course unesselitialthat separate collars 12 and 1 3 be applied to the shaft sections toreceive the interlocking tongues and slots 17 and 1l, respectively, thefunction of the loose connections thus formed being merely torcouple theshaft sections together in such manner as to allow their relative freelateral movement.

The primary shaft-section 9 is 'journaled within a suitable bearingtherefor formed in the depending lug 18 of the bed-plate, and has fixedupon its rearward end the bevelpinion 19 meshing with the similar pinion20 upon the lower end of the upright shaft 21 extending upwardly throughthe hollow bracket'arm standard and having fixed upon its upper end thebevel-pinion 22 meshing in turn with the pinion Q3 iixed upon themainshaft 3. The rotarv movement ot' the sectional looper-shaft is thusderived from-the main-shaft through bevel gearing which may bemaintained in ixed relation under all conditions without impairment ofany of its elements by reason of the lateral movements communicated fromthe lower shaft to the looper.

Secured to the bottom of the bed-plate' by screws 2l is the dependingyoke 25 straddling the looper-shaft and formed with ay bearing boss 26having its axis transverse to 'and passing intermediate theadjacent'ends of the shaft sections and in substantially inteisectingrrelation with the axes of said sections. Fitted within the bore of saidboss is the depending fulerum-stud 27 of a bearing block 28 formed withparallel shaftapertures 29 and 30, as represented particularly in Fig.8, the former a Wording a pivoted bearing `for the shaft-section 10which is confined against endwise movement therein by the collar 12 atone end and ay second collar 3l. at the other end secured in position bya set-screw. The fnlcrum-stud 27 is confined in )osition in its bearingboss b means b of the screw 32 tapped into the same with its headpartially overlying the lower end of the bearing boss.

The forward portion of the shaft-section 10'adjacent the looper isjournaled in a bearin'g aperture 33 of the slide-block 34 which isfitted within a transverse slide-way pro.

vided in a cross member 1 depending from the bed-plate in which it isconfined by means of the strap secured in position by screws 36substantially as represented in the -in` the bed-plate.

said pendin application. The forward portion ot t e shaft 1s thussustained for .s1dew1se movement 1n conpmction with the Arotarymovements derived from the mainshaft through the described connections.

The shaft-section 10 has fixed thereon near the slide-block 34, theeccentric 37 embraced by the. strap 38 at one endof the connecting rod39 whose apertured opposite endembraces the stud-pin l0 secured bymea-ns of theset-serew 41 within an aperture in' the bed-platecross-member 1. As the strap' 38 embracing the actuating eccentric 37 1smaintained a fixed distance from the stationary stud-pin 40 by theconnecting rod, each rotation of the shaft obviously produces a lateraljogging movement of the latter with its bearing slide-block 34, theswivelcd bearing block 28 permitting the free horizontal vibratorymovement of the shaft upon the stud Q7 as a fulcrum. i

rl`he slide-block 3l is formediin onette'fd with a depending lug 42carrying the overi hanging bearing boss 43 formed with thel supportingplate 48 above which is sustained the upper work-clamping member 49 Y bymeans of theI sprang-pressed arm 50 secured upon the block 51 whichis--mountcd upon the rearward end of the bar 47. The bar 47 is connectedby suitable means intermediate its ends with thc slide-plate 52 beneaththe bed-plate -having a link connection 53 with onearm 54 of a bellcrankfulcrumed at 55 and provided with a slotted arm 56 which is connected inturn by means of the linkelement 57 with the lower arm 58 of a rockleverdepending through a suitable aperture Said rock-lever carries np'on itsupper arm a roller-stud enterin an actuating cam-groove in the controling cam-wheel 59 which is in practice suitably:

connected with the main-shaft for imparting to the work-clamp joggingmovements crosswiseof the bed-plateand hence in 4the plane of the rotarymovement of the looper.

'lhe bar 4.7 has upon its rearward end the upright post 60 entering. ablock 61 fitted within the laterally channeled arm-62 of e rock-leverhaying upon its upper arm 63 the roller 64 entering a suitable grooveinthe4 cani-wheel 59. When the block 61 is'adjacent the fulcrum of therock-leverV 62 63,the

therefore be seen thatthe preferable', other connect the shaft sections,

arsenaapost 6() affords a fnlcrum upon .which the sidewise movements ofthe {Work-holder are ,performed A,

The' machine, as thus described, operates substantiallyinthe mannerdescribed in the pendingapplication Serial "l lo. 828,663, before"hie'ntioncd. In the operation of the stitch-formingmechanism, thelooper performs arotation foreach reciprocation of the needle. andjogging movements of the same frequency to compensate for the alternatelateral shifting movements of the work with the work-holder to-insurethe proper coperation of the needle and looper in each positionof thework-holder.

It is-evidently immaterial tothe present improvement in connection with,what type of stitchforn'iing mechanism it is employed, and whether theloop-taker shaft are continuous or oscillatory. 'Itis evident that,While the form universal coupling shown and described is forms may beemployed to and that the form of coupling herein represented does notequire the' employment of collars 12 and 13 separate from the shaftsections. It` will present improvement is not limited to the particularconstruction and arrangement of .parts shown and described herein, butmay be considerably varied without-departure from the scope ofthe'invention.

Having thus'set forth the nature of the invention, what I claim hereinist- 1.111 a sewing machine, in' combination,

a reciprocating needle, a shaft formed lin 'separate sections arrangedend-to-end, turning means for one of said sections, a bearing for theother of said sections-having a fulcrum with lits axis transverse to andpassing intermediate the adjacent ends of said sections, meansforimparting to. the secondnamed section lateral 'jogging movements uponsaid fulcrum, a universal coupling intermediate the adjacent ends ofsaidsections, and a loop-taker 4mounted upon the second-named section ofsaid shaft for cooperation with said needle.

2.- In a sewing machine, in combination, a reciprocating' needle.I ashaft formed in separate primary and secondary sections arrangedend-to-end, turning means for the primary section. a bearing for thesecondary section having a fulcrum with its axis transverse to anddisposed in substantially in 3. In a sewing machine, in combination, y

rotary movements of the' (if Afor the other of said couplingintermediate,

a reciprocating needle, a shaft formed in adjacent ends of said withtransverse pivseparate sections arranged end-to-end, turn! a couplingblock disi separate sections arranged end-to-end, turning means for oneof sections having a fulcrum with its axis transverse to and passingintermediate the adjacent ends of said sections, name section lateralupon said fulcrum, a posed intermediate the adjacent ends of saidsections with which it' has transverse tongue-and-slot connections eachdisposed transversely of the other, and a loop-taker mounted upon thesecond-named section of said shaft for coperation with said needle.

5. '1n a sewing machine, in combination, a reciprocating needle, a shaftformed in separate sections arranged end-to-end and provided at theiradjacent extremities each with'a diametrical slot, turning;r means forone of said sections, a hearing for the'other of said sectipns having afu1crum\\vith its axis transversetotand disposed in substantiallyintersectimgr relation with the axes of said sections', means forin'iparting tosaid second named section lateral jogging movements uponsaid fulcrum, a coupling block interposed between the ends of saidsections and provided upon its opposite faces with transverse tongueseach disposed crsswise of the other and entering the transverse slot ofthe' adjacent shaft section, and a looptaker mounted upon 'thesecond-named section of said shaft for coperation with said needle.

6. In a sewing machine', a reciprocating needle, a work-lloldeigmeansfor producing relative jogging movements between said' needle andWork-holder, a rotary shaft comprising separate primary and secondarysections arranged end-to-end, a fixed bearingin -which the primary shaftjogging movements coupling block dlssection is j-ournalcd, actuatingmeans for.

said sections. a'hearing- .means for imparting to the secondincombination, i

secondary shaft section and oopernting with the needle in the productionof Stitches,

means for imparting to the secondary seo-v tion lateziil joggingmovements upon said ulei'um, and :i universal. couplingintei'mediute theadjacent ends of Said Section5.

7. ln a sewing humhine, the combination 'with the frame comprising ulied-plate und f1 bracket-erin including a hollow Standard and :inoverlianging tubulin' portion, of e -main-shaft journaled in thebracket-arm, n loop-taker Shaft formeel in separato primary andsecondary sections arfanged end-to-end und disposed beneath theleed-plinios a fixed bearing beneath the bed-plate for the primary Shaftsection, :L driving connection embraced 'by said standard between themain-shaft and said shaft section, a hanger rigidly connected with anddepending from the`bed-plote and hailing a bearing boss with its axistransverse to and passing 1n- Atermedmte the adjacent ends of said slec-

